Detachable and adjustable table extension



Nov. 14, 1961 G. D. SiEMANTEL DETACHABLE AND ADJUSTABLE TABLE EXTENSION2 Sheets-Sheet 1 Filed July 8, 1958 mm m m am m \\\\\\T m mm 8 om mm QR650. D S/EMA/VTEL ATTORNEY Nov. 14, 1961 G. D. SIEMANTEL DETACHABLE ANDADJUSTABLE TABLE EXTENSION 2 Sheets-Sheet 2 Filed July 8, 1958 INVENTORG50. 0. SIEMANTEL ATTORNEY United States This invention relates to newand useful improvements in attachments for power tool tables such asthose on table saws, band saws, jointe'rs and belt sanders.

When working on relatively long lengths of stock with power tools of thecharacter involved due to the portron extending beyond the edges of thepower tool table, two men are generally required to maintain thematerial in a proper horizontal position to be worked upon, onemaintaining the stock level and the other moving it through the tool.

A primary object of this invention is to provide a detachable andadjustable table extension for power tools, the attachment being readilyand economically manufactured, easily installed, removed and adjusted,and highly satisfactory and practical for the purpose intended.

' Further objects of the subject invention reside in details of thetable extension which facilitate the adjustment and detachability of thesame.

' Other objects and a fuller understanding may be had by referring tothe following description and claims, taken in conjunction with theaccompanying drawings, in which:

FIGURE 1 is a side elevation of the novel extension table in relation toa fragmentary portion of a typical power tool upon which it is mounted;

FIGURE 2 is a top plan view of FIGURE 1;

FIGURE 3 is an enlarged fragmentary section taken substantially on line33 of FIGURE 2;

7 FIGURE 4 is an enlarged section taken on line 4-4 of FIGURE 1; I

FIGURE Sis a side elevation similar to FIGURE 1 showing anotherembodiment of the novel table extension;

FIGURE 6 is a top plan view of FIGURE FIGURE'7 is an enlarged sectiontaken on line 77 of FIGURE 5, portions being broken away; and

FIGURE 8 is a fragmentary view similar to a portion of FIGURE 7, showinganother embodiment of longitudinal reinforcing beam for'the extensiontable.

Referiug to FIGURES 14, a fragmentary portion of a power tool isindicated generally at 10 including vertical legs 12 (only one shown)supporting a horizontal table 14. Indicated generally at 16 is the tableextension of the invention which is adjustably and detachably supportedas will subsequently be described in detail. In order to modify thepower tool to accommodate the attachment 16, secured to the edge 18 ofthe table is an angle member 20, the vertical flange 22 thereof beingsecured to the edge 18 by means of suitable nut and-bolt assemblies 24,V and the laterally projecting flange 26 thereof has longitudinallyspaced drilled portions for receiving-abolttherethrough.Securedcentrally of a transverse lower plate 28' isstudelement 30 which includes an upwardly extending portion 32. v

The table extension 16 comprises an elongated planar body member 34'ofany suitable. metal such as cast aluminum, for example, and may includecut out portions 36 to lighten the same: The body member includes onits'underside a depending lug 38 transversely apertured at '40 asmost'clearly seen in FIGURE 3. Formed in the upper surface 41 of thebody member and opening into the end 42 and sideedges 44 and 46 thereofare similar elongated recessed portions 48 for accommodating mitergauges; for example. The body member includes spaced counter sunk boresfor receiving suitatent i 2 able bolts 49 which extend through thelongitudinally spaced apertures in the flange 26 and an intermediatespacer block 50 of any suitable thickness, and wing nuts 52' are securedonvthe lower ends of the bolts 49 for detachably retaining the bodymember to the table of the power tool. t

The table extension 16 includes at its other end 54 a transverserecessed portion 56, apertured at 58 for accommodating nut-and-boltassemblies (not shown) to provide means by which cooperating portions ofanother table extension element (not shown) may be secured.

The lug 38 receives through the aperture 40 a threaded stud 59 whichincludes on one end thereof a jam nut 60.

Journaled on the stud 59 is the eye portion 62 of a threaded bolt 64which forms a part of a turnbuckle assembly indicated generally at 66.The stud includes thereon a washer 68 and clamping nut 70 to secure thebolt 64 in a predetermined angular relation relative to the generalplane of the body member 34 and in axial alignment with end 32 of thestud 30.

The turnbuckle assembly 66 includes an elongated threaded stud 72 havingthreads cut opposite those of bolt 64 and an elongated cooperating nutelement 74 secures opposite ends of the bolt and nut together. Suitablejam'nuts 76 are provided on the stud and bolt to maintain the turnbuckleassembly in an adjusted condition, stud 72 is fixedly secured in theupper end of a tube 78, the lower end of the tube being received on theend 32 of the stud 30. A transverse handle 79 extends through anintermediate portion of the tube to facilitate ready rotation of thetube.

The body member 34 will have sufiicient flexibility whereby theturnbuckle nut '74 may be rotated to dispose the upper surface 41 of thebody member in co-planar relation with the upper surface of the bed 14of the power tool. The table extension may be left on the power toolwhen it is not being used, or if space is at a premium, the extensionmay be readily removed from the power tool by'disengaging the wing nuts52 from the bolts 49, it being noted that the tube 78 can be readilyslid off the stud 30. Remounting the table extension involves aprocedure the reverse of that just mentioned, if the tube has been leftto remain inits previously adjusted condition. However, if readjustmentis required it may be accomplished in a simple and expeditious mannerthrough the expedient of the turnbuckle assembly 66and clamping nut 70.

In order to facilitate movement of a work piece on the table extensionand support those portions projecting beyond the side edges 44 and 46thereof, a plurality of support rods 80 are provided. Each of the rods80 include a threaded shoulder end 82 received in a threaded bore 34opening into the side edge of the body member, the rods being of anydesired length and having a longitudinal surface portion coplanar withthe surface 41 of the body member as clearly seen in FIGURE 4. Thelongitudinal axis of the rods 80 is angularly directed approximately 1degree i.e. 89 degrees with respect to edges 44 and 46; see FIGURE 2 orFIGURE 6, toward the direction of travel of the Work piece moving fromend 42 toward end 54 of the body member 34. Through this expedient theleading edge of a work piece encounters a minimum resistance when firstmoving onto the rods since the leading edge of the work piece firstengages that ofthe rods 80 closest to the side edges 44 and 46 in itsmovement along the extension table. The terminal Patented Nov. 14, 19613 power tools. The elements 88 include a transverse bore 90 throughwhich the rods 80 extend, and a threaded bore 92 communicates with thebore 90' and receives a clamp screw 94 therein. The clamp screw includesan eye portion 96 convenient for adjusting the screw during installationand removal of the elements 88, also for hanging the attachment up whenremoved from the power tool.

Considering FIGURES -8, another embodiment of the table extension isindicated generally at 100', this embodiment being installed andadjusted in substantially the same manner as the embodiment previouslydescn'bed, but including a body member formed of wood instead of metal.The power tool will be modified or have as a factory installation thestud 30 including the upwardly directed end 32, and the angle memberincluding flanges 22 and 24 for the purposes previously mentioned.

The table extension 100 comprises a suitable wooden body member 102having secured therebeneath by means of recessed bolts 104 transversebrace elements 106, 106 and 106", which willtend to prevent the bodymember from warping. Secured in depending relation longitudinallybeneath the body member 102 by bolts 103 is a Wooden beam 110 which alsobraces the body member against warpage. A suitable tapered shim 112 maybe utilized between the beam 110 and brace element 106 to correct forlongitudinal bowing of the body member. The beam 110 may comprise a pairof juxtaposed elongated elements 114 which are retained together byscrews 116, this expedient obviating warping of the beam, or a metalstrip (not shown) may be inserted in one sidefor the same purpose.

The beam 110 receives a wing nut-and-bolt assembly 113 therethrough towhich is secured the eye portion 120- of a bolt 122 forming part of aturnbuckle assembly 124. The bolt is preformed whereby the threaded endhas a fixed annular relation to the general plane of the body member 102and will be in axial alignment with end 32 of the stud 30. Theturnbuckle assembly 124 includes an elongated nut 125 terminating in aprojecting shaft 126' which is fixed in the end of a tube 128 by meansof welding, for example. The lower end of the tube is telescoped on end32 of the stud 30 and is rotatable thereon. i am nuts 130 are providedon the bolt 122 and shaft. 126 for engaging the nut 125 to maintain theparts in adjustment. The tube includes a transverse rod 132 therethroughto facilitate rotation of the tube and nut 125 to maintain the uppersurface co-planar with the upper surface of the table of the power tool.As seen in FIGURE 8, the wooden beam 110 may be replaced by a metal beam110' if desired.

To accommodate the rods 80 on the body member 102, see FIGURE 7,brackets 134 are provided, each of these brackets including a leg 136secured beneath the body member 102 by recessed bolts 138, and a leg 140includes a bore 142 normal to leg 140 to accommodate the threadedshoulder portions of the rods 80' therein, and so that the top surfaceof rods 80 will be maintained coplanar with upper surface of the table102. In leg 136 are drilled two holes to receive bolts 138longitudinally centered and near each end of leg 136. The holes near leg140 are drilled the exact size for bolts 138, and the holes nearestthe'center of the body member 102 are drilled inch larger than the boltsize. This permits tightening of the outside end bolt first, thenpulling the rod 80 back in angular relation to the leading edge of awork piece for the purpose previously described and then tightening theinside end bolt. This is an economical way of manufacturing and obviatesthe need for right and left hand brackets as well as mistakes inapplication.

The table extension 100 may be adjusted through the medium of theturnbuckle assembly 124, and may be readily removed and installed in themanner previously described.

From the foregoing description considered in connection with theaccompanying drawings, it is believed-that the construction andadvantages of the novel table extension will be readily appreciated.Although several embodiments have been disclosed, it will be clear thatminor changes may be made in details of construction'without departingfrom the. spirit of the invention. This invention is not to be limited.tothe precise details described, but it is intendedto cover allvariations and modifications falling within thescope of the claims.

Having thus described the invention, what is claimed 1. A tableextension attachment for power tools comprising an elongated body memberhaving an upper surface to be disposed in coplanar relation to the powertool table, means on one end of the body member for detachablyconnecting the body member to the power tool, and extensible brace meansangularly. depending from an undersurface portion of said body member,said brace means including a lower end portion comprising means for freeremoval from a cooperating portion on the power tool, said. attachmentincluding support means for modifying the power tool, said support meanscomprising an angular stud element for securement in upwardly extendingrelation from a lower portion of the power tool and terminating in aportion removably engaging said lower end portion of the extensiblebrace means, and a mounting member including separable fasteners tofacilitate ready mounting and removal of the attachment from the powertool, said extensible brace means including a tubular rod removablyreceivable at one end on said stud element, means on said tube forrotating it about its longitudinal axis, an elongated threaded shaft,integral with said tube and projecting from the other end thereof, anelongated nut engageable at one end on said threaded shaft, a boltprojecting ang-ularly from the undersurface of said body member andengageable at the other end of said elongated nut, and lock nut meansengageable with ends of said elongated nut, bolt and shaft for retainingthe parts in adjusted relation. 7

2. In a table for power tools comprising an elongated body member havinganupper surface, support rods extending laterally from side edgeportions ofsaid body member for supporting a portion of a work piecethereon, each. of said rods including a portion co -planar with theupper surface of said body member, said rods having a circular crosssection in which a linear longitudinal surface portion thereof is saidportion co-planar with the upper surface of said "body member, said rodsbeing disposed in angular relation away from the edge portions of saidbody member whereby the leading edge of a work piece moved over saidbody member will initially engage that portion of the rods immediatelyadjacent the edge of the body member.

3. The structure of claim 2 inwhich. said rods include removableelements thereon alignable to provide a laterally adjustablerip fence onsaid rods.

References Cited in the file of this patent UNITED STATES PATENTS1,405,599 Lane Feb. 7, 1922 1,474,323 Geibel i Nov. 13, 1923 1,567,441Howard Dec. 29, 1925 1,762,740 Rains June 10, 1930 2,230,929 Bray et al.Feb. 4, 1941 2,533,894 Podell Dec. 12, 1950 2,697,458 Cue Dec. 21, 19542,722,243 Nagy Nov. 1, 1955 2,816,783 Robertson Dec.v 17, 1957 FOREIGNPATENTS 148,555 Switzerland Oct. 1, 1931 309,648 Switzerland Nov. 16,1955

